Water-heating apparatus.



'No 849,317. 'PATENTED APR. 2, 1907.

v. w. BLANGHARD. WATER HEATING APPARATUS.

APPLICATION FILED JAN. 22, 1906.

a uoe ntoz Gum/M15 UNITED STATES PATENT OFFICE.

WATER-H EATING APPARATUS.

Specification of Letters Patent.

Patented April 2, 1907.

Application filed January 22, 1906. Serial No. 297,252.

To aZZ whom it may concern:

Be it known that I, VIRGIL W. BLANCH- ARD, of New York, in the county ofNew York and State of New York, have invented certain new and usefulImprovements in Water-Heating Apparatus; and I hereby declare that thefollowing is a full, clear, andexact description thereof, referencebeing had to the accompanying drawings, which form part of thisspecification.

This invention is an improvement in water-heating apparatus, designed tobe operated by the waste heat from gas burned like coal in thefuel-chamber of a gas cookingrange; and it consists of the novelconstruction of the water-heating portion of the gas heater or range, ashereinafter described and claimed, and will be fully understood from thedescription of the apparatus and the drawings, in which Figure 1 is anelevation of a complete waterheating system embodying my invention. Fig.2 is a transverse section through the water-heating portion of theapparatus; and Fig. 3 is a vertical section through the upper part ofthe gas heater or range, showing the water-heating device therein.

A designates a gas heating apparatus which is preferably constructedsubstantiallyas shown in my application for gas-burners, Serial No.297,240, filed January 22, 1906. This heater has a double-walled casing,having an outer metallic jacket A and an inner metallic jacket A Withinthis casing is a perforated partition B, from which is sus pended aburner F, provided with constrictions f and lateral perforations f forthe admission of air into the ascending current of burning gases passingthrough the burner. The burner is also provided with a metallic jacketF, provided with perforations F for the admission of air between it andthe burner, so that the air supplied to the perforations f will behighly heated before they enter the burner. The gaseous mixtures tosupport combustion are supplied to the lower end of the burner from apipe E connected to any suitable source of supply.

Above the burner and supported on the partitionB is aninverted-cup-shaped casting D, which is closed at its upper end andprovided with apertures or ports (1 at its lower end for the escape ofthe heating-gases, which pass outwardly and upwardly around said castingD into the upper end of the heater and impinge against the top plate (1thereof.

The burner and all the parts mentioned become intensely heated, and theadjacent walls of the casing become highly heated both by direct contactwith the gases and by the conduction and radiation of heat from theintensely-heated casting D. To conserve the heat in this upper portionof the heater, I place within the hollow walls thereof a coil of pipe G,water being admitted into the lower end thereof at g and taken from theupper end thereof at g. This coil extends entirely around the casingfrom a point below the plate B to the top of the casting D 01' bottom ofthe outlet a from the heater. The upper part of coil G adjacent thisoutlet has a return-bend G, which extends to the top of the casing oneach side of the outlet a In this manner the largest amount ofwaterheating pipe is placed in the casing that' it is feasible to do,and this water-pipe is preferably packed betweentlie walls A and A ofthe casing with a filling G of pulverized firebrick or other suitablematerial. In this manner the heat which would be otherwise wasted byabsorption, conduction, and radiations through these walls is utilizedto heat the water in the coil G, and owing to the length of this coil(twenty-two feet in length in a small-sized range) a very large amountof water can be rapidly heated by circulating it therethrough.

The pipe G is connected with a water-inlet pipe I, a valve 71 beingplaced on said pipe so that the water can be cut off from the coil whendesired. The pipe G also connects with the return-pipe j, leading fromthe lower end of the tank J, which is of usual con struction, while theupper end of pipe G is connected to the upper end of said tank by a pipeg, as shown in Fig. 1. The pipe may be provided with a valve j, whichshould normally stand open, and when open a constant circulation ofwater can be maintained through the coil G, pipe g, tank J, andreturnpipe j to the coil G. The lower end of the tank J may be connectedby a pipe J direct to the supply-pipe I above the valve 'i. The watermay be withdrawn from the tank J through a service-pipe J which may leadto any conventent part of the kitchen, and through other service-pipes Jand J which can be led to any desired part of the building, said pipesJ", J, and J being provided with suitable valves 7'', 7' and j.

The gas-burner portion of the apparatus is preferably constructed asdescribed inmy aforesaid application, and the heater may be constructedas described in my application for gas cooking-stoves, Serial No.297,250, filed January 22, 1906, and utilized either for heating orcooking. The coil itself does not consume any heat except that whichwould naturally be lost by conduction or radiation through the walls,and all the heated productsof combustion can be utilized for cookingpurposes or for heating purposes. The employment of a water-coil in theupper portion of the gas heating cooking stove or furnace, both as ameans of preventing the loss of heat by radiation from the gas-burningportion of the apparatus during the summer months, thereby adding to thecomfort of the kitchen, and also as a means for heating water fordomestic purposes, I consider a novel and valuable improvement.

The pipe J may be provided with a valve, as at J", so that the tank canbe entirely closed if it is necessary to disconnect the heater therefromat any time.

Having thus described my invention, what I therefore claim as new, anddesire to secure by Letters Patent thereon, is-

l The combination of a gas heating device, comprising a casing closed atits upper end and having an outlet at one side near its upper end, apartition in said casing below the outlet, and a burner suspended fromsaid partition discharging burning gases above the same with awater-heating coil, said coil being continuous below the outlet of thefurnace and having a return-bend opposite the outlet.

2. The combination of a gas heating device, comprising a double-wallcasing closed at its upper end and having an outlet at one side near itsupper end, a partition in said casing below the outlet,-and a burnersuspended from said partition discharging burning gases above the samewith a water-heat ing coil inclosed in the walls of the casing, saidcoil being continuous below the outlet of the furnace and having areturn-bend opposite the outlet.

3. The combination with a gas-burning stove or furnace having doublewalls, an annular partition in the upper part thereof, a v

top plate closing the upper end of said furnace, a burner suspended fromsaid partition, means for discharging gaseous mixtures into said burner,an inverted-cup-shaped casting above the burner adapted to cause theproducts of combustion to pass up close to the walls of the stove abovethe partition, and a water-heating coil inclosed in the walls of thefurnace adjacent to and surrounding the said casting.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

VIRGIL w. BLANOHARD.

In presence of JAMES R. MANSFIELD, L. E. VITHAM.

